Rohm LAPIS SEMICONDUCTOR ML620Q503, User Manual

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ML620Q503/Q504 User's Manual
Chapter 14 UART with FIFO(UARTF)
FEUL620Q504 14-6
14.2.4 UARTF0 Interrupt Status Register (UAF0IIR)
Address: 0F7C4H
Access: R
Access size: 8/16 bits
Initial value: 0001H
7 6 5 4 3 2 1 0
UAF0IIRL
UF0FMD1 UF0FMD0
– – UF0IRID2 UF0IRID1 UF0IRID0 UF0IRP
R/W R R R R R R R R
Initial value 0 0 0 0 0 0 0 1
15 14 13 12 11 10 9 8
UAF0IIRH – – – – – – – –
R/W R R R R R R R R
Initial value 0 0 0 0 0 0 0 0
UAF0IIR is a special function register (SFR) used to indicate the UART state in interrupt transmit/receive
operations.
UAF0IIR stores information indicating that an interrupt with a certain priority level is pending, along with the
type of that interrupt. IIR indicates the interrupt with the highest priority level that is pending.
Description of Bits
•
UF0IRP (bit 0)
UF0IRP indicates whether a UARTF0 interrupt was generated.
UF0IRP0 Description
0 Interrupt was generated
1 Interrupt was not generated (initial value)